Create your own J-pole scanner antenna

Frequency in Mhz for you J-pole
1/4 wave element (Section "A") Inches
1/2 wave element Inches
Full length of driven side (Section "B") Inches
Gap between two poles (section "C") Inches
Connection Offset (Section "D") Inches
Optimal Frequency Range Mhz

J-Pole Design Diagram

Decimal Value

1/32

1/16

1/8

1/4

1/2

.03125

1/32

.0625

2/32

1/16

.09375

3/32

.125

4/32

2/16

1/8

.15625

5/32

.1875

6/32

3/16

.21875

7/32

.25

8/32

4/16

2/8

1/4

.28125

9/32

.3125

10/32

5/16

.34375

11/32

.375

12/32

6/16

3/8

.40625

13/32

.4375

14/32

7/16

.46875

15/32

.50

16/32

8/16

4/8

2/4

1/2

.53125

17/32

.5625

18/32

9/16

.59375

19/32

.625

20/32

10/16

5/8

.65625

21/32

.6875

22/32

11/16

.71875

23/32

.75

24/32

12/16

6/8

3/4

.78125

25/32

.8125

26/32

13/16

.84375

27/32

.875

28/32

14/16

7/8

.90625

29/32

.9375

30/32

15/16

.96875

31/32

1.0

32/32

16/16

8/8

4/4

2/2